Toonz 3D Export plug-in allows 2D animators to work together with 3D animators, taking the steps of the following workflow.

• Animate your scene, your 3D objects and your 3D camera in Softimage 3d / Softimage|XSI.
• In the 3D scene, place any number of dummy objects, to which the 2D animation has to be registered.
• Press the "Export to Toonz" button that writes out your dope sheet (with a .xsh extension).
• Render the 3D part separately.
• Go in Toonz and load the dope sheet exported by the 3D software: the xsheet will be completely empty, except for some pegbars information (N/S, E/W and Field values) that track the dummy objects positions.
• Load - as full color levels - the 3D rendered scene and assign the pegbars to the animated levels in order to make them "follow" the dummy objects position.
• Preview the scene.
• Once happy, run the compositing process.

Note that complex muti-layering of 2D & 3D is a rather simple production process that only involves multi-pass 3D render. For example, if you want to have a 2D driver visible through the window "into" a 3D car, you can render the car in slices to be used in Xsheet on top and behind the 2D driver.